Atomic-Scale Insights Into the Thermal Stability of High-Entropy Nanoalloys.

ABSTRACT: High entropy alloy nanoparticles bring hope to developing more efficient nanomaterials for high-temperature applications. Nevertheless, the enhanced thermal stability of nearly equiatomic nanoalloys containing at least 5 metals is nothing more than theoretical speculation about the impact of thermodynamic contributions on their structural properties and remains to be proven. Here, in situ aberration-corrected scanning transmission electron microscopy (STEM) and molecular dynamics simulations are combined to investigate at the atomic scale the thermal behavior of AuCoCuNiPt nanoparticles (NPs) from 298 to 973 K. Both in situ STEM heating and atomistic simulations reveal strong structural and chemical evolutions in the NPs with the formation and melting of an AuCu layer at the surface of NPs

SUBMITTER: Krouna S 

PROVIDER: S-EPMC11775865 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature